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- W2000232615 abstract "2,5-Dichlorobenzoquinone reacts with veratrole in 70% v/v aqueous sulphuric acid to form 2,5-dichloro-3-(3,4-dimethoxyphenyl)-1,4-benzoquinone (III; X = H, Y = Cl), 2,5-dichloro-3,6-bis-(3,4-dimethoxyphenyl)-1,4-benzoquinone [III; X = 3,4-(MeO)2C6H3, Y = Cl], and 1,4-dichloro-7,8-dimethoxydibenzofuran-2-ol (IV; X = H, Y = Cl). Similar reactions with 2,6-dichlorobenzoquinone give 2,6-dichloro-3,5-bis-(3,4-dimethoxyphenyl)-1,4-benzoquinone [III; X = Cl, Y = 3,4-(MeO)2C6H3], 1,3-dichloro-7,8-dimethoxydibenzofuran-2-ol (IV; X = Cl, Y = H), and 1,3-dichloro-7,8-dimethoxy-4-(3,4-dimethoxyphenyl)dibenzofuran-2-ol [IV; X = Cl, Y = 3,4-(MeO)2C6H3]. In both cases the veratrole oxidation products 2,3,6,7,10,11-hexamethoxytriphenylene (I) and 2,5,6,9,12,13-hexamethoxydibenzo[fg,op]naphthacene-1,10-quinone (II) are also obtained. The dibenzofurans result from the acid-catalysed cyclisation of the corresponding arylbenzoquinones; similar cyclisations can be effected by visible light." @default.
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- W2000232615 date "1974-01-01" @default.
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- W2000232615 title "Reactions of quinones with aromatic ethers. Part III. Arylbenzoquinones and dibenzofurans from 2,5- and 2,6-dichlorobenzoquinone and veratrole" @default.
- W2000232615 doi "https://doi.org/10.1039/p19740002260" @default.
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